Window screen



F. M. SEARS WINDOW SCREEN Aug. 22, 195o 2 Sheets-Shea@ l Filed April 24, 1947 .fammi T/ N5 my w F F. M. SEARS WINDOW SCREEN Aug. 22, 1950 2 Sheets-Sheet 2 Filed April 24, 1947 INVENToR, i760 /WJea/v.

Patented Aug. 22, 195' WINDOW SCREEN Fred M. Sears, Carthage, Mo., assigner to R. L. Platt, C. E. Platt, H. E. Williams, F. B. Williams, andFred M. Sears, all f Carthage,.Mo., doing business as Practo Products Company, Carthage, Mo. s

Application April 24, 194

Claims. (Cl. 16o- 3.28)

This invention relates to improvements in vwindow screens of the framelesstype, having a screen fabric clipped or bound at.relative opposite Yends respectively by a binding rail for direct attachment to the window frame, and upon tautly spanning the screen fabric, its longitudinal margins are brought into contact with relative rails designated as blind stops protruding inwardly from the window frame.

The invention accordingly consists of adetachable window screen provided with a top and bottom rail only, the top rail being xedto the window frame by screws, and said bottom rail being composed of two relatively, vertically sliding parts, fitted with holding devices forattachment to the window vcasing or to `any other structure whereby the screen fabric may be put under tension after it has been positioned in the window frame, thus holding it taut with its edges straight and in contacting relation with the front surface of the blind stop of the window frame orto any other support to which the screen isapplied. J

The principal object of this invention isthe provision of a frameless type screen having novel tensioning means whereby the Yframeless screen may be easily and effectively putunder ytension and against the blind stop of the window frame with a minimum of effort.

Other objects are simplicity and economy of construction, ease and efficiency of operation,

and adaptability for use with any type of frameless screen when it is desirable to. tension and maintain the screen fabric in a substantially planar form.

With these objects in View, as well as other objects which will appear during the-course of the specification, reference will be had to the drawings wherein- Figure 1 is a front elevation of a frameless window screen embodying this invention.

Fig. 2 is a sectional view taken on line II--II of Figure l.

Fig. 3 is a fragmentary enlarged sectional View taken on line III-III of Figure l.

Fig. 4 is a fragmentary sectional View taken on line IV-IV of Figure 1.

Fig. 5 is a sectional View taken on line V-V of Figure 6.

Fig. 6 is a sectional view taken on line VI-VI of Figure 5.

Fig. '7 is a sectional View taken on line VII- VII of Figure 5.

Fig. 8 is a sectional view taken on line VIII- mounted an elongated sealing strip V34.

7, Serial No. 743,622

characters refer to similar parts and the numeral I8 designates a windowirame` of the common standard type having a sill I2 to which .the tensioning, meansA is secured, an upper window stop rail I4. to which the top binding rail of the screen .isv attached, and. side stop rails or blind `stops I6 against which the marginal edge portions of the screen fabric is fitted when in the operative position. It .will be noticed that the outer faces thereagainst it will liein said plane.

.The screen .fabric I8 is of `substantially rectangular form and is providedat its upper edge with a U-fold towhichis adapted tombe fitted between A the spaced apart portions of one leg 22 of the top angled bindingbar ,Z4 which is secured to lstop bar I4 by means of screws 26. It will be noted `that the vertical leg 22 is rebent on itself to form a recess 28 into which the Uffolcl ofthe screen I8 isi-ltted.`

The -bottomvfrail A39 comprises an elongated binding rail `on Which is vertically, slidably Strip 34 has stuck-out tongues. 36 which, respectively vextend through.` Vertical slots 38 formed through the body vof rail...).,V Theseztongues are pressed against the inner wall of rail 3i] to preclude separation of rail and strip 3.4 and to permit free relative movement thereof. Rail 391s longitudinally oil-set at 40 kto form a4 groove 42along its inner face. The upper edgeportion of rail `Sil is rebent on itself to form a downwardlyfopen U-shaped groove .member n44 to receive .the.,.up turned edge portion 45 of screen I8. .Sealing strip 34 is provided.- with outwardlyA and .downwardly inclinednpperand lower flanges 4.8. and

5I) which serve to strengthen the strip and to drain water outwardly from the structure.

A screen tensioning means comprises a tensioning lever 52 of substantially channel shape pivotally secured by pivot 54 through one of its flanges 56 and the lower portion of rail Si). The metal of the strip and rail about pivot 54 is offset inwardly to present a recess 53 for the outer head of the pivot 54 as clearly shown in Figure 8. The top portion of the inner end of lever 52 is downwardly recessed at 56 to receive the rounded end of adjusting screw 58 which is operatively mounted in the angled bracket 6I! which is pivoted at 62 to the rail 30 as clearly shown in Figures 5 and 7. It will be noted that the metal of rail 36 and bracket 6I! about pivot 62 is inwardly recessed to provide a recess 63 to receive the outer head of pivot 62.

A screweye 64 securely mounted in sill I2 adjustably carries a fulcrurn bar 66 of substantially channel shape which is provided with a plurality of vertically spaced apart holes 68 adapted to receive the outer end portion of lever 52 which is turned slightly upwardly at I0 to preclude accidental separation of the parts.

When the screen is to be tensioned the adjusting screw 58 is screwed upwardly a suflicient distance to permit downward movement of the outer end ID of lever 50 to engage in the proper hole 68 of bar 56 then theoperator adjusts` screw 58 until the desired tensioning of the screen is obtained. As shown, there isa tensioningv meansprovided at each of the opposite side portions of the screen to obtain proper tensioning pull throughout its entire width.

Brackets 'l2 secured to sill I2 adjacent the eentral portion of rail 3Q serve to prevent inward distortion of the rail as. the tension is applied to the. screen.

When the tensioningl means are set at both sides. of the screen the sealing strip 34` is free to drop` by gravity s0 that its lower flange 50 will close the space betweenv rail 3l]` and sill I2.

It will be noted from the aboveA description that I have provided a window screen that isY so constructed that it may be` easily installed: orremoved from the Window and which willf at all times maintain the` screening underl tension. over' the window opening.` Another important feature of this inventionis theA fact that the. screening not only is secured under tension, but also is urged snugly against the window. stops, thus eiliciently sealingthewindow opening.

It is obvious that various minor changes may Ebeimade inthe structure Without departing from the-spirit of the invention.

What I claim as new` and desire to secure by LettersPatent is:

1. A screen for windows comprising a sheet of screen fabric, a binding railsecured to the upper` edge ofk saidY screen sheet and secured to the upper portion. of a window frame, ai binding rail secured to the lower edgeportion of=saidscreen in. spaced relation above the'sill of vsaid window iframe, a lever pivoted intermediate its ends to said'binding rail', a support anchoredlto saidrsill,

' one end of said lever-adapted to-engagelsaidIsupport, and screw adjustingineans carriedrbyisaid binding rail adaptedto engage the otherendi of said lever, whereby the leverlis moved about its pivot to tension said screen.

2. In a window screen of thet class described, a.. sheet of screen secured at its upper edgeto a window frame, a binding, railsecured to the lower, edge of said sheet ofv screen, a lever pivoted intermediate its ends to said binding rail, a fuicrum secured to said window frame below said sheet of screen and adapted to receive one end of said lever, and an adjustable means carried by said binding rail to engage the other end of .said leverA whereby the lever may be adjusted to tension said sheet of screen.

3. In a Window screen of the class described, a sheet of screen secured at its upper edge to a window frame, a binding rail secured to the lower edge of said sheet of screen, a lever pivoted intermediate its ends to said binding rail, a fulcrum securedA to said window frame below said sheet of screen and adapted to receive one end of-v said lever, an adjustable means carried by said binding rail to engage the other end of said lever whereby the lever may be adjusted to tension said sheet of screen, and a sealing strip adjustably carried by said binding rail at its outside to close the window opening between said binding rail: andithe window` frame.

4. In a window. screen of the class described, a sheet of. screen secured atits upper edge to. a window frame, a4 binding` railv secured tothe lower edge of said sheet of screen,V a lever pivoted intermediate its ends. t0-` said binding rail, a. fulcrum secured to said. window framev below said sheet of screen, and adaptedy to adjustably receive and secure one endY of said lever. against vertical' movement; and. means, carriedl by said binding rail; and having-adjustable meansoperable to engage. and move. the. other end of; seid lever, whereby the sheet ot screen is tensioned,

5. In a window screen of the class` described, a sheet of screen. secured, at its upper edge to a window frame, aldi,mlinngI rail` securedf to, thelcwer edge of said sheetoffscreen`l a lever pivoted iut-e1;- mediateits ends tolsaid; binding rail, aA fglllcrum secured to said window., frame. below said sheet of screen, and. adaptedfto adjustably receive and Secure one endoi said leverage-inst vertical movement, a bracket pvotedtov said binding rail,.van adjusting screw operatively mounted in v said. bracket andi adapted'. toeneaee andfmeve. the

otherv end of said lever, whereby to tension said sheet of: screem REFERE N12ES`v C11-ED The followingreferences are of recordf inthe fileof this p-atent:

UNITED STATES, PATENTS 

